Skin tightening device



FIG. 1 is a left front perspective view of a skin tightening device,showing my new design;

FIG. 2 is a right rear perspective view thereof;

FIG. 3 is a left rear perspective view thereof;

FIG. 4 is a right front perspective view thereof;

FIG. 5 is a front end view thereof;

FIG. 6 is a rear end view thereof;

FIG. 7 is a left side view thereof; the right side view being a mirrorimage thereof;

FIG. 8 is a top view thereof; and,

FIG. 9 is a bottom view thereof.

The broken lines illustrate portions of the skin tightening device andform no part of the claimed design.

CLAIM The ornamental design for a skin tightening device, as shown anddescribed.